CN214581183U

CN214581183U - Flow guiding type heat pipe heat exchanger

Info

Publication number: CN214581183U
Application number: CN202022844530.8U
Authority: CN
Inventors: 王建
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-11-24
Filing date: 2020-11-24
Publication date: 2021-11-02
Anticipated expiration: 2030-11-24

Abstract

A diversion type heat pipe exchanger comprises a heat pipe exchanger box body, a pipe plate and a diversion type heat pipe bundle, wherein a diversion type heat pipe is composed of a hot end and a cold end, a smoke heating section is called as the hot end, the other section is called as the cold end, base pipes of the hot end of the diversion type heat pipe are all in an elliptical shape, and vertical longitudinal rib diversion fins are symmetrically welded on two sides of the long axis direction of the elliptical cross section, so that a complete hot end structure with diversion and functions is formed.

Description

Flow guiding type heat pipe heat exchanger

Technical Field

The utility model relates to an application of heat pipe technique in flue gas waste heat recovery field specifically is exactly a water conservancy diversion formula heat pipe exchanger.

Background

In the prior art of the heat pipe heat exchanger, in the utilization of flue gas waste heat in the fields of coal-fired power plants, coal chemical industry, cement plants, blast furnace gas and the like, because the environmental emission standard is improved, ammonia escapes after the SCR technology is adopted for system denitration, the original flue gas is rich in NH4HSO4, the application process of the traditional dividing wall type heat exchanger in the field meets the technical problems of viscous ash blockage, increasingly aggravated low-temperature corrosion and the like, although the heat pipe heat exchanger shows good characteristics in the process of solving the problems, when the heat pipe technology is used for transforming the low-temperature section of the heat pipe in the field of flue gas waste heat utilization, no matter a heat pipe type low-pressure economizer, a heat pipe type air preheater or an air preheater, the heat pipe at the flue gas side of the heat exchanger adopts a circular pipe type structure, in order to reduce the viscous ash blockage caused by the ash passing at the flue gas side, the flue gas side adopts a light pipe measure, but the actual operation verification is carried out, when the pipe diameter of the flue gas side is large and the pitch design of the heat exchanger pipes is small, the flowing ash blockage at the flue gas side is still aggravated, and particularly when the heat pipe with the large pipe diameter is adopted for increasing the axial heat transfer power of a single heat pipe, the resistance is increased obviously. After the light pipe is adopted on the flue gas side, the convection heat transfer coefficient outside the pipe is greatly reduced, and the number of the pipes must be increased in order to ensure the heat transfer capacity, so that two problems are brought, namely, the space can be utilized insufficiently, and the heat transfer capacity and the heat transfer power can not meet the requirements, so that the contradiction is solved, the heat pipe technology is smoothly applied to the low-temperature flue gas heat exchange of a coal-fired power plant, the problems that viscous ash is blocked and a fan is rich and has insufficient pressure head in the waste heat recycling process of the original flue gas are solved, and the problems to be solved are solved.

Disclosure of Invention

The utility model aims at providing a water conservancy diversion formula heat pipe exchanger.

The heat pipe heat exchanger with the structure is produced, the problem that the heat exchange power of the smoke side light pipe is insufficient can be solved, the heat pipe heat exchanger becomes more compact, and the heat exchange power of the heat exchanger per unit volume is enhanced. The flue gas side of the heat pipe adopts an elliptical pipe structure shape, the long axis direction of the elliptical section is parallel to the flow direction of the flue gas, and the longitudinal symmetrical fin structure outside the elliptical pipe forms the functions of guiding the flue gas flow and homogenizing the flow field, and the homogenization of the flow field can reduce the frequency formed by the Karman vortex street and reduce resonance.

The technical scheme is as follows: a diversion type heat pipe exchanger.

The technical solution consists of the following specific features.

A diversion type heat pipe exchanger comprises a heat pipe exchanger box body which is composed of a heating end flue gas channel and a heat dissipation end fluid channel.

A diversion type heat pipe exchanger comprises a diversion type heat pipe bundle, wherein each independent diversion type heat pipe is arranged in a staggered manner or in a straight line manner, or in a mixed arrangement manner formed by the staggered manner and the straight line manner.

A diversion heat pipe exchanger includes a diversion heat pipe cold end and its hot end having the same structure or a high frequency spiral finned tube structure, when the hot end channel fluid is smoke and the cold end channel fluid is air, the smoke-air diversion heat pipe exchanger is composed of the hot end and the heat pipe of the cold end structure.

A diversion type heat pipe exchanger comprises a diversion type heat pipe heat exchanger, wherein the cold end and the hot end of the diversion type heat pipe can be of an oval light pipe structure or a circular tube light pipe structure, and when a hot end channel fluid is flue gas and a cold end channel fluid is liquid, the heat pipes of the hot end and the cold end structure can form a gas-liquid diversion type heat pipe exchanger.

A heat exchanger of guide-type heat pipe is composed of guide-type heat pipe, and anticorrosion layer on its hot end, which can be high-temp enamel plating or laser deposition or high-temp arc spraying.

A flow-guiding type flow-resistance heat pipe exchanger comprises a flow-guiding type flow-resistance heat pipe, wherein the pipe material of the flow-guiding type flow-resistance heat pipe can be ND steel with low-temperature corrosion resistance.

A diversion type heat pipe exchanger comprises a diversion type heat pipe material which can be ND steel with low-temperature corrosion resistance.

A diversion type heat pipe exchanger comprises a heat exchanger box body which can be in a vertical installation mode, a horizontal installation mode or an inclined installation mode.

The utility model discloses a realize like this, it is oval-shaped to process the heat pipe hot junction, then with the pipe wall outside that guide fin symmetric welding corresponds oval pipe major axis, produce complete water conservancy diversion formula heat pipe according to heat pipe production technical requirement, so far, the water conservancy diversion formula heat pipe that contains hot junction and cold junction has been accomplished, then assemble the water conservancy diversion formula heat pipe to the tube sheet, constitute heat exchanger tube bank assembly, at last hoist this assembly to the heat exchanger box in, like this, a water conservancy diversion formula heat pipe heat exchanger that contains hot junction fluid passage and cold junction fluid passage has just been accomplished.

The utility model has the advantages that the following problems existing in the flue gas waste heat recycling of the existing heat pipe exchanger are solved, firstly, the equipment volume occupies large space, and the space requirement of the existing technical transformation can not be well adapted and satisfied; secondly, because the fan of the unit running on line has rich pressure head which is small, the technical improvement of the low-temperature flue gas heat exchanger is limited, the self-environmental-protection emission standard is improved, after the coal-fired power plant adopts the denitration technology SCR, the low-temperature flue gas waste heat exchanger has the problem of worse sticking and blocking, which causes the continuous surge of the induced draft fan and influences the safe and stable operation of the boiler, therefore, the solution to the problem is particularly urgent and important, and after the technology of the diversion type heat pipe exchanger is developed, the problem can be effectively solved, firstly, the advanced diversion type heat pipe heat exchange structure can make the volume of the equipment more compact, can improve the heat exchange power in unit volume of the heat exchanger, can flexibly adapt to the technical improvement requirement of the on-line operation of the flue gas low-temperature section heat exchanger, and simultaneously, the diversion type heat pipe heat exchanger, because the flow field is even, still will solve the problem that draught fan abundance pressure head is not enough, have better adaptability in the technical transformation of unit than current pure circular tube heat exchanger.

Drawings

The structure of the utility model is given by the following mode drawings.

Fig. 1 is a diagram of a diversion type heat pipe heat exchanger of the present invention.

Fig. 2 is a structure diagram of a single heat pipe of a diversion type heat pipe exchanger of the present invention.

Fig. 3 is a sectional view of the flow-guiding heat pipe exchanger in the direction of a-a of the present invention.

Fig. 4 is a B-B direction cross-sectional view of a single heat pipe of a diversion type heat pipe exchanger of the present invention.

Detailed Description

Referring to fig. 1, 2, 3 and 4, a diversion type heat pipe heat exchanger shown in fig. 1, 2 and 4 includes a heat exchanger case 1, a diversion type heat pipe 2, a hot end fluid channel 3, a hot end 4, a pipe plate 5, a cold end 6, a cold end fluid channel 7 and a hot end diversion fin 8. In the specific implementation, the hot end 4 of the heat pipe is processed into an oval shape, then the guide fins 8 are symmetrically welded on the hot end 4, and the complete guide type heat pipe 2 is produced according to the technical and technological requirements of heat pipe production, so far, the guide type heat pipe comprising the hot end 4 and the cold end 6 is completed, then the guide type heat pipe 2 is assembled on the pipe plate 5 according to the designed pipe row arrangement mode to form a heat exchanger pipe bundle assembly, and the assembly is hoisted into the heat exchanger box body 1, so that the guide type heat pipe heat exchanger comprising the hot end fluid channel 3 and the cold end fluid channel 7 is completed.

Claims

1. A diversion-type heat pipe exchanger is characterized by comprising a heat pipe exchanger box body, a pipe plate and a diversion-type heat pipe bundle, wherein a diversion-type heat pipe comprises a hot end and a cold end, a flue gas heating section is called as the hot end, the other section is called as the cold end, a base pipe of the hot end of the diversion-type heat pipe is elliptical, and vertical longitudinal rib diversion fins are symmetrically welded on two sides of the long axis direction of the elliptical cross section to form a complete hot end structure with diversion and functions.

2. The flow-guiding heat pipe exchanger of claim 1, wherein the heat pipe exchanger housing is comprised of a heating side flue gas channel and a heat sink side fluid channel.

3. The guided heat pipe heat exchanger of claim 1 wherein the guided heat pipe bundle comprises individual guided heat pipes arranged in staggered or in-line arrangements, or in a mixed arrangement of staggered and in-line arrangements.

4. The guided heat pipe heat exchanger of claim 1 wherein the cold end of the guided heat pipe has the same structure as the hot end of the guided heat pipe or a high frequency spiral finned tube structure, and when the hot end channel fluid is flue gas and the cold end channel fluid is air, the guided heat pipe heat exchanger of flue gas-air type is formed by the hot end and the cold end structured heat pipe.

5. The heat pipe heat exchanger of claim 1 wherein the cold and hot ends of the heat pipe are oval light pipe structures or round tube light pipe structures, and when the hot end channel fluid is flue gas and the cold end channel fluid is liquid, the heat pipes of the hot and cold end structures form a gas-liquid type heat pipe heat exchanger.

6. The heat exchanger of claim 1 wherein the hot end surface of the heat pipe is protected from corrosion by high temperature enameling, laser deposition, or arc spraying.

7. The guided heat pipe heat exchanger of claim 1, wherein the guided heat pipe is ND steel with low temperature corrosion resistance.

8. The heat pipe heat exchanger of claim 1, wherein the heat exchanger housing is vertically mounted, horizontally mounted, or inclined mounted.